У= 179-179=0
b= 17-26= -9
a= 30-30=0
x = 16-9= 7
c= 18+8= 26
y= 89+89=188
c= 70-30=40
y= 12+6=18
y= 140-50=90
a=30-10=20
b= 40-40=0
x= 100-75=25
x= 22+12= 34
c= 63-0=63
b= 23-7= 16
y=100-90=10
c= 98-97=1
b= 30-18=12
a= 100-40=60
b=25+75=100
a= 17-9=8
c= 50+50=100
a= 7+8=15